Concurrent display and adjustment of 3D projection, coronal slice, sagittal slice, and transverse slice images
US5371778A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1991 |
| Grant date | Dec 6, 1994 |
| Priority date | — |
| Expiry date | Nov 29, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S378/901
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A CT scanner (A) non-invasively examines a volumetric region of a subject and generates volumetric image data indicative thereof. An object memory (B) stores the data values corresponding to each voxel of the volume region. An affine transform algorithm (60) operates on the visible faces (24, 26, 28) of the volumetric region to translate the faces from object space to projections of the faces onto a viewing plane in image space. An operator control console (E) includes operator controls for selecting an angular orientation of a projection image of the volumetric region relative to a viewing plane, i.e. a plane of the video display (20). A cursor positioning trackball (90) inputs i- and j-coordinate locations in image space which are converted (92) into a cursor crosshair display (30) on the projection image (22). A depth dimension k between the viewing plane and the volumetric region in a viewing direction perpendicular to the viewing plane is determined (74). The (i,j,k) image space location of the cursor is operated upon by the reverse of the selected transform to identify a corresponding (x,y,z) cursor coordinate in object space. The cursor coordinate in object space is translat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.